The Weekly update V18.104.22.168.21.DEV has been officially released for Redmi K50 (codename is rubens). Before updating, please make sure you have downloaded the exact ROM matching your Xiaomi phone/tablet. In Fastboot mode, you can check model code by typing
fastboot getvar product in cmd/shell.
The firmware files posted here are all official Xiaomi ROM, xiaomiROM.com do not own and never modified those firmwares，you will always download the file from Xiaomi server.
You may interest in those contents: Redmi K50 ROM Topics Xiaomi Devices Index
Download Redmi k50 (rubens) China MIUI 14 V22.214.171.124.21.DEV Recovery ROM with Android 13.0. Firmware size is 6.4 GB.